Finding the Fourth Proportional to 8,243.78, 12,367.49 and 4,086.05

Step by Step Solution

1. Step 1: Write the proportion equation
   8,243.78 : 12,367.49 = 4,086.05 : x
2. Step 2: Convert to fraction form
   8,243.78/12,367.49 = 4,086.05/x
3. Step 3: Cross multiply
   8,243.78x = 12,367.49 × 4,086.05
4. Step 4: Simplify right side
   8,243.78x = 50,534,100.25
5. Step 5: Solve for x
   x = 50,534,100.25/8,243.78
6. Step 6: Final answer
   x = 6,129.97